设计了一个模拟智能家居系统，该系统以STC单片机作为控制核心，利用双音多频信号作为远距离的通信信号，利用串口进行模块内部的通信。文章详细介绍了系统的组成、工作原理及其软硬件设计。- The paper designs a system which simulates the intelligent home system. The system takes STC MCU as the control core, uses the DTMF signals as the long-distance communication signals, and serial communication as the communication method between the internal modules. This paper introduces the composition, working principle and the design of hardware and software.